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Polymerization method of anion modified polyacrylamide inverse emulsion having high solid content and high molecular weight

A technology of inverse emulsion polymerization and anion modification, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of inability to achieve flocculation effect and low molecular weight of the copolymer, so as to prevent violent aggregation, improve clarity, improve solid The effect of content

Active Publication Date: 2014-06-25
DONGYING BAOMO ENVIRONMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the third functional monomer 4-MASA inhibits the activity of free radicals due to chain transfer during the polymerization process, so that the molecular weight of the copolymer is not high, so a good flocculation effect cannot be achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Add 115 parts of deionized water to a 1000ml beaker, add 115 parts of pure acrylic acid (AA), and adjust PH=8.75 with about 182 parts of sodium hydroxide with a mass concentration of 35%. Activated carbon, which accounts for 10 wt% of sodium acrylate, was added to the solution, stirred at a constant temperature of 40 °C for 1 h, adsorbed the residual polymerization inhibitor in acrylic acid, filtered to obtain a pure sodium acrylate solution, and then 75 parts of refined acrylamide (AM) was dissolved in In pure sodium acrylate solution (SA), the AM / SA monomer solution is obtained.

[0020] 2) Into a 2000ml beaker, add 243.5 parts of 7# white oil, 15 parts of methyl glucoside sesquistearate and 30 parts of propylene glycol monostearate as an emulsifier (the total amount of emulsifier added accounts for the total amount of solvent). 6% by weight), dissolved and formulated into an oil phase. The oil phase was placed in a high shear mixer, and then the water phase was a...

Embodiment 2

[0025] 1) Add 115 parts of deionized water to a 1000ml beaker, add 115 parts of pure acrylic acid (AA), and adjust pH=8.55 with about 182 parts of sodium hydroxide with a mass concentration of 35%. Activated carbon, which accounts for 10 wt% of sodium acrylate, was added to the solution, stirred at a constant temperature of 40 °C for 1 h, adsorbed the residual polymerization inhibitor in acrylic acid, filtered to obtain a pure sodium acrylate solution, and then 75 parts of refined acrylamide (AM) was dissolved in In pure sodium acrylate solution (SA), the AM / SA monomer solution is obtained.

[0026] 2) To a 2000ml beaker, add 292.2 parts of 80# solvent oil, 15.5 parts of methyl glucoside sesquistearate and 31 parts of propylene glycol monostearate as emulsifier (the total amount of emulsifier added accounts for the total amount of solvent). 6% by weight), dissolved and formulated into an oil phase. The oil phase was placed in a high shear mixer, and then the water phase was a...

Embodiment 3

[0031] 1) Add 115 parts of deionized water to a 1000ml beaker, add 115 parts of pure acrylic acid (AA), and adjust pH=7.95 with about 182 parts of sodium hydroxide with a mass concentration of 35%. Activated carbon, which accounts for 10 wt% of sodium acrylate, was added to the solution, stirred at a constant temperature of 40 °C for 1 h, adsorbed the residual polymerization inhibitor in acrylic acid, filtered to obtain a pure sodium acrylate solution, and then 75 parts of refined acrylamide (AM) was dissolved in In pure sodium acrylate solution (SA), the AM / SA monomer solution is obtained.

[0032] 2) Into a 2000ml beaker, add 340.9 parts of 7# white oil, 37.5 parts of methyl glucoside sesquistearate and propylene glycol monostearate as emulsifier (the total amount of emulsifier added accounts for the total weight of the solvent; 10%), dissolved and formulated into an oil phase. The oil phase was placed in a high shear mixer, and then the water phase was added and emulsified...

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PUM

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Abstract

The invention provides a synthesis method of inverse emulsion of a modified polyacrylamide flocculating agent, and in particular relates to a polymerization method of anion modified polyacrylamide inverse emulsion having high solid content and high molecular weight. A method for oxidizing and reducing an initiator from paramisansodium (4-MASANa) and ammonium persulfate-sodium hydrogen sulphite by feeding the third monomer, namely methacrylamide, is adopted; the temperature change in the polymerization reaction is effectively controlled; the high molecular weight of an emulsion product is obtained; furthermore, because of containing a salicylic acid functional group, fine particles and metal ions in suspension can be well absorbed strongly; the flocculating effect and the clarity of the suspension are increased; by means of evaporating and concentrating in vacuum at high pressure in a rotating manner, the solid content of the modified polyacrylamide inverse emulsion products is increased; a compound interface membrane can be generated by compounding the used compound emulsifiers, namely methyl glucoside sesquialter stearate and propylene glycol monostearate, in a certain proportion; and the long-term steady preservation of inverse emulsion under the condition of high solid content can be effectively realized.

Description

technical field [0001] The invention relates to an anion-modified polyacrylamide inverse emulsion polymerization process, and in particular adopts the method of inverse emulsion ternary copolymerization to synthesize ultra-high-end products that meet the fields of mineral extraction, red mud sedimentation, oil extraction and urban domestic sewage treatment. The polymer modified polyacrylamide emulsion polymer belongs to fine chemical industry and also belongs to the field of polymer synthesis. Background technique [0002] As a linear water-soluble polymer, polyacrylamide is one of the most widely used water-soluble polymers. Polyacrylamide is a general term for acrylamide and its derived homopolymers and copolymers. Polyacrylamide has low, medium, high and ultra-high molecular weights. According to the dissociation properties of functional groups on the macromolecular chain of polyacrylamide (PAM) in aqueous solution, it can be divided into anionic (CPAM), cationic (APAM)...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08F220/60C08F2/32C08F4/40C08F6/20C02F1/56
Inventor 刘皓徐坤赵守敬李岳军王曰鹏
Owner DONGYING BAOMO ENVIRONMENT ENG CO LTD
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